<template>
	<div class="sc-filterBar">
		<slot :filterLength="filterObjLength" :openFilter="openFilter">
			<el-badge :value="filterObjLength" type="danger" :hidden="filterObjLength <= 0">
				<el-button icon="el-icon-filter" @click="openFilter"></el-button>
			</el-badge>
		</slot>

		<el-drawer title="过滤器" v-model="drawer" :size="650" append-to-body>
			<el-container v-loading="saveLoading">
				<el-main style="padding: 0">
					<el-tabs class="root">
						<el-tab-pane lazy>
							<template #label>
								<div class="tabs-label">过滤项</div>
							</template>
							<el-scrollbar>
								<div class="sc-filter-main">
									<h2>设置过滤条件</h2>
									<div v-if="filter.length <= 0" class="nodata">
										没有默认过滤条件，请点击增加过滤项
									</div>
									<table v-else>
										<colgroup>
											<col width="50" />
											<col width="140" />
											<col v-if="showOperator" width="120" />
											<col />
											<col width="40" />
										</colgroup>
										<tr v-for="(item, index) in filter" :key="index">
											<td>
												<el-tag>{{ index + 1 }}</el-tag>
											</td>
											<td>
												<py-select v-model="item.field" :options="fields" placeholder="过滤字段"
													filterable @change="fieldChange(item)">
												</py-select>
											</td>
											<td v-if="showOperator">
												<el-select v-model="item.operator" placeholder="运算符">
													<el-option v-for="ope in item.field
														.operators ||
														operator" :key="ope.value" :label="ope.label" :value="ope.value"></el-option>
												</el-select>
											</td>
											<td>
												<el-input v-if="!item.field.type" v-model="item.value"
													placeholder="请选择过滤字段" disabled></el-input>
												<!-- 输入框 -->
												<el-input v-if="
													item.field.type ==
													'text'
												" v-model="item.value" :placeholder="item.field
													.placeholder ||
													'请输入'
													"></el-input>
												<!-- 下拉框 -->
												<el-select v-if="
													item.field.type ==
													'select'
												" v-model="item.value" :placeholder="item.field
													.placeholder ||
													'请选择'
													" filterable :multiple="item.field.extend
														.multiple
														" :loading="item.selectLoading
															" @visible-change="
																visibleChange(
																	$event,
																	item
																)
																" :remote="item.field.extend.remote
																	" :remote-method="(query) => {
																		remoteMethod(
																			query,
																			item
																		);
																	}
																		">
													<el-option v-for="field in item
														.field.extend.data" :key="field.value" :label="field.label" :value="field.value"></el-option>
												</el-select>
												<!-- 日期 -->
												<el-date-picker v-if="
													item.field.type ==
													'date'
												" v-model="item.value" type="date" value-format="YYYY-MM-DD" :placeholder="item.field
													.placeholder ||
													'请选择日期'
													" style="width: 100%"></el-date-picker>
												<!-- 日期范围 -->
												<el-date-picker v-if="
													item.field.type ==
													'daterange'
												" v-model="item.value" type="daterange" value-format="YYYY-MM-DD" start-placeholder="开始日期"
													end-placeholder="结束日期" style="width: 100%"></el-date-picker>
												<!-- 日期时间 -->
												<el-date-picker v-if="
													item.field.type ==
													'datetime'
												" v-model="item.value" type="datetime" value-format="YYYY-MM-DD HH:mm:ss" :placeholder="item.field
													.placeholder ||
													'请选择日期'
													" style="width: 100%"></el-date-picker>
												<!-- 日期时间范围 -->
												<el-date-picker v-if="
													item.field.type ==
													'datetimerange'
												" v-model="item.value" type="datetimerange" value-format="YYYY-MM-DD HH:mm:ss" start-placeholder="开始日期"
													end-placeholder="结束日期" style="width: 100%"></el-date-picker>
												<!-- 开关 -->
												<el-switch v-if="
													item.field.type ==
													'switch'
												" v-model="item.value" active-value="1" inactive-value="0"></el-switch>
												<!-- 标签 -->
												<el-select v-if="
													item.field.type ==
													'tags'
												" v-model="item.value" multiple filterable allow-create default-first-option no-data-text="输入关键词后按回车确认"
													:placeholder="item.field
														.placeholder ||
														'请输入'
														"></el-select>
											</td>
											<td>
												<el-icon class="del"
													@click="delFilter(index)"><el-icon-delete /></el-icon>
											</td>
										</tr>
									</table>
									<el-button type="text" icon="el-icon-plus" @click="addFilter">增加过滤项</el-button>
								</div>
							</el-scrollbar>
						</el-tab-pane>
						<el-tab-pane lazy>
							<template #label>
								<div class="tabs-label">常用</div>
							</template>
							<el-scrollbar>
								<my ref="my" :data="myFilter" :filterName="filterName" @selectMyfilter="selectMyfilter">
								</my>
							</el-scrollbar>
						</el-tab-pane>
					</el-tabs>
				</el-main>
				<el-footer>
					<el-button type="primary" @click="ok" :disabled="filter.length <= 0">立即过滤</el-button>
					<el-button type="primary" plain @click="saveMy" :disabled="filter.length <= 0">另存为常用</el-button>
					<el-button @click="clear">清空过滤</el-button>
				</el-footer>
			</el-container>
		</el-drawer>
	</div>
</template>

<script>
import config from "@/config/filterBar";
import pySelect from "./pySelect";
import my from "./my";

export default {
	name: "filterBar",
	components: {
		pySelect,
		my,
	},
	props: {
		filterName: { type: String, default: "" },
		showOperator: { type: Boolean, default: true },
		options: { type: Object, default: () => { } },
	},
	data() {
		return {
			drawer: false,
			operator: config.operator,
			fields: this.options,
			filter: [],
			myFilter: [],
			filterObjLength: 0,
			saveLoading: false,
		};
	},
	computed: {
		filterObj() {
			const obj = {};
			if (this.filter) {
				this.filter.forEach((item) => {
					obj[item.field.value] = this.showOperator
						? `${item.value}${config.separator}${item.operator}`
						: `${item.value}`;
				});
			}
			return obj;
		},
	},
	mounted() {
		//默认显示的过滤项
		if (this.fields) {
			this.fields.forEach((item) => {
				if (item.selected) {
					this.filter.push({
						field: item,
						operator: item.operator || "include",
						value: "",
					});
				}
			});
		}
	},
	methods: {
		//打开过滤器
		openFilter() {
			this.drawer = true;
		},
		//增加过滤项
		addFilter() {
			if (!this.fields || this.fields.length <= 0) {
				this.$message.warning("无过滤项");
				return false;
			}
			const filterNum = this.fields[this.filter.length] || this.fields[0];
			this.filter.push({
				field: filterNum,
				operator: filterNum.operator || "include",
				value: "",
			});
		},
		//删除过滤项
		delFilter(index) {
			this.filter.splice(index, 1);
		},
		//过滤项字段变更事件
		fieldChange(tr) {
			let oldType = tr.field.type;
			tr.field.type = "";
			this.$nextTick(() => {
				tr.field.type = oldType;
			});
			tr.operator = tr.field.operator || "include";
			tr.value = "";
		},
		//下拉框显示事件处理异步
		async visibleChange(isopen, item) {
			if (
				isopen &&
				item.field.extend.request &&
				!item.field.extend.remote
			) {
				item.selectLoading = true;
				try {
					var data = await item.field.extend.request();
				} catch (error) {
					console.log(error);
				}
				item.field.extend.data = data;
				item.selectLoading = false;
			}
		},
		//下拉框显示事件处理异步搜索
		async remoteMethod(query, item) {
			if (query !== "") {
				item.selectLoading = true;
				try {
					var data = await item.field.extend.request(query);
				} catch (error) {
					console.log(error);
				}
				item.field.extend.data = data;
				item.selectLoading = false;
			} else {
				item.field.extend.data = [];
			}
		},
		//选择常用过滤
		selectMyfilter(item) {
			//常用过滤回显当前过滤项
			this.filter = [];
			this.fields.forEach((field) => {
				var filterValue = item.filterObj[field.value];
				if (filterValue) {
					var operator = filterValue.split("|")[1];
					var value = filterValue.split("|")[0];
					if (field.type == "select" && field.extend.multiple) {
						value = value.split(",");
					} else if (field.type == "daterange") {
						value = value.split(",");
					}
					this.filter.push({
						field: field,
						operator: operator,
						value: value,
					});
				}
			});
			this.filterObjLength = Object.keys(item.filterObj).length;
			this.$emit("filterChange", item.filterObj);
			this.drawer = false;
		},
		//立即过滤
		ok() {
			this.filterObjLength = this.filter.length;
			this.$emit("filterChange", this.filterObj);
			this.drawer = false;
		},
		//保存常用
		saveMy() {
			this.$prompt("常用过滤名称", "另存为常用", {
				inputPlaceholder: "请输入识别度较高的常用过滤名称",
				inputPattern: /\S/,
				inputErrorMessage: "名称不能为空",
			})
				.then(async ({ value }) => {
					this.saveLoading = true;
					const saveObj = {
						title: value,
						filterObj: this.filterObj,
					};
					try {
						var save = await config.saveMy(
							this.filterName,
							saveObj
						);
					} catch (error) {
						this.saveLoading = false;
						console.log(error);
						return false;
					}
					if (!save) {
						return false;
					}

					this.myFilter.push(saveObj);
					this.$message.success(`${this.filterName} 保存常用成功`);
					this.saveLoading = false;
				})
				.catch(() => {
					//
				});
		},
		//清空过滤
		clear() {
			this.filter = [];
			this.filterObjLength = 0;
			this.$emit("filterChange", this.filterObj);
		},
	},
};
</script>

<style scoped>
.tabs-label {
	padding: 0 20px;
}

.nodata {
	height: 46px;
	line-height: 46px;
	margin: 15px 0;
	border: 1px dashed #e6e6e6;
	color: #999;
	text-align: center;
	border-radius: 3px;
}

.sc-filter-main {
	padding: 20px;
	border-bottom: 1px solid #e6e6e6;
	background: #fff;
}

.sc-filter-main h2 {
	font-size: 12px;
	color: #999;
	font-weight: normal;
}

.sc-filter-main table {
	width: 100%;
	margin: 15px 0;
}

.sc-filter-main table tr {}

.sc-filter-main table td {
	padding: 5px 10px 5px 0;
}

.sc-filter-main table td:deep(.el-input .el-input__inner) {
	vertical-align: top;
}

.sc-filter-main table td .el-select {
	display: block;
}

.sc-filter-main table td .el-date-editor.el-input {
	display: block;
	width: 100%;
}

.sc-filter-main table td .del {
	background: #fff;
	color: #999;
	width: 32px;
	height: 32px;
	line-height: 32px;
	text-align: center;
	border-radius: 50%;
	font-size: 12px;
	cursor: pointer;
}

.sc-filter-main table td .del:hover {
	background: #f56c6c;
	color: #fff;
}

.root {
	display: flex;
	height: 100%;
	flex-direction: column;
}

.root:deep(.el-tabs__header) {
	margin: 0;
}

.root:deep(.el-tabs__content) {
	flex: 1;
	background: #f6f8f9;
}

.root:deep(.el-tabs__content) .el-tab-pane {
	overflow: auto;
	height: 100%;
}

[data-theme="dark"] .root:deep(.el-tabs__content) {
	background: none;
}

[data-theme="dark"] .sc-filter-main {
	background: none;
	border-color: var(--el-border-color-base);
}

[data-theme="dark"] .sc-filter-main table td .del {
	background: none;
}

[data-theme="dark"] .sc-filter-main table td .del:hover {
	background: #f56c6c;
}

[data-theme="dark"] .nodata {
	border-color: var(--el-border-color-base);
}
</style>
